Which factors contribute to an aircraft's stall?

The correct choice highlights the key factors that directly contribute to an aircraft's stall: angle of attack, weight, and load factor.

The angle of attack is crucial because a stall occurs when this angle exceeds the critical threshold, causing airflow to separate from the wing’s upper surface and resulting in a significant loss of lift. Every aircraft has a specific critical angle of attack that must not be exceeded during flight maneuvers.

Weight plays a significant role in stall conditions. Heavier aircraft need to generate more lift to maintain flight, which affects how much angle of attack can be applied before a stall occurs. As weight increases, the stall speed also increases; thus, pilots must be aware of their aircraft’s weight and its implications on stall performance.

Load factor further impacts stall behavior. This factor relates to the G-forces experienced by the aircraft, which can increase during maneuvers such as turns. An increase in load factor effectively increases stall speed, as the aircraft must achieve a higher angle of attack to maintain lift at these increased load conditions.

In summary, understanding the interplay between angle of attack, weight, and load factor is essential for pilots to prevent stalls and maintain safe flight operations.